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The power of any test of statistical significance will be affected by four main parameters: the effect size the sample size (N) the alpha significance criterion (α) statistical power, or the chosen or implied beta (β) All four parameters are mathematically related. If you know any three of ... - read more

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the null hypothesis is false. That is, It can be equivalently thought of as the probability of correctly accepting the alternative hypothesis when the alternative hypothesis is true - that is ... - read more

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